# US 2022/0273271 A1 · Medical filtration system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0273271 A1 - Document ID: US20220273271A1 - Status: Published application - Kind: A1 - Application number: 17/683,270 - Filed: 2022-02-28 - Published: 2022-09-01 - Earliest claimed: 2021-02-27 - Applicants: Control Medical Technology, LLC - Inventors: Shawn P. Fojtik - Web page: https://patentgrep.com/patent/US20220273271A1 ## CPC - A61B 10/0045: {Devices for taking samples of body liquids} - A61B 10/0283: {with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe (A61B10/025, A61B10/0266 take precedence)} - B01D 46/2403: {characterised by the physical shape or structure of the filtering element} - B01D 46/4254: {Allowing or improving visual supervision, e.g. lamps, transparent parts, windows} - B01D 2275/201: Conical shape - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A filtration system may include a chamber and a filter disposed within an interior the chamber. A closed end, or a tip, of the filter may face an inlet into the interior of the chamber. An open end, or a base, of the filter may surround an outlet from the interior of the chamber. As a sample passes through the interior of the chamber, solid and/or semisolid material in the sample may be collected between an exterior surface of the filter and an interior surface of the chamber, and may be viewed through the chamber. ## Claims ### Claim 1 A filtration system that filters medical aspirant obtained from a body of a subject, comprising: a chamber with a distal side including an inlet port, a chamber interior in communication with the inlet port, and a proximal side including an outlet port in communication with the chamber interior; and a filter within the chamber interior, the filter being elongated and including an open end, a closed end, and a filter interior between the open end and the closed end, the closed end having a smaller dimension than the open end, the closed end being oriented toward the distal side of the chamber, the open end being oriented toward the proximal side of the chamber. ### Claim 2 (depends on 1) The filtration system of claim 1, wherein the chamber interior is cylindrical in shape and the filter is conical or frustoconical in shape. ### Claim 3 (depends on 1) The filtration system of claim 1, wherein a wall of the chamber is transparent. ### Claim 4 (depends on 1) The filtration system of claim 1, wherein a wall of the chamber is flexible. ### Claim 5 (depends on 1) The filtration system of claim 1, wherein the filter can slide within the chamber interior, along a length of the chamber interior. ### Claim 6 (depends on 5) The filtration system of claim 5, further comprising: a spring within the chamber interior. ### Claim 7 (depends on 6) The filtration system of claim 6, wherein the spring comprises a compression spring within the chamber interior, between the filter and the proximal side of the chamber. ### Claim 8 (depends on 1) The filtration system of claim 1, further comprising: an aspirator; and a tube that establishes communication between the aspirator and the outlet of the chamber. ### Claim 9 (depends on 8) The filtration system of claim 8, wherein apertures of the filter minimize interruption to flow of fluid through the filtration system. ### Claim 10 (depends on 8) The filtration system of claim 8, wherein apertures of the filter enable fluid to flow through the filter at a same rate as the fluid can flow through the tube. ### Claim 11 (depends on 8) The filtration system of claim 8, further comprising: a catheter that establishes communication between the body of the subject and the inlet of the chamber. ### Claim 12 A method for aspirating a sample from a body of a subject, comprising: positioning a distal end of an elongated medical device at a location of the body of the subject from which the sample is to be obtained; securing the elongated medical device to an inlet of a chamber of a filtration system; placing an aspirator in fluid communication with an outlet of the chamber; using the aspirator to draw the sample from the elongated medical device into the chamber; and capturing solid and/or semisolid material between a filter in an interior of the chamber and a wall of the chamber. ### Claim 13 (depends on 12) The method of claim 12, wherein capturing the solid and/or semisolid material includes capturing the solid and/or semisolid material between a cylindrical wall of the chamber and a side of an elongated filter with a distal end that is smaller than a proximal end of the elongated filter. ### Claim 14 (depends on 12) The method of claim 12, further comprising: viewing the solid and/or semisolid material through the wall of the chamber. ### Claim 15 (depends on 12) The method of claim 12, further comprising: manually holding the chamber. ### Claim 16 (depends on 15) The method of claim 15, wherein manually holding the chamber includes sensing movement of the filter along a length of the interior of the chamber. ### Claim 17 (depends on 15) The method of claim 15, wherein manually holding the chamber includes squeezing the chamber to force the solid and/or semisolid material through the filter. ### Claim 18 (depends on 12) The method of claim 12, further comprising: non-visibly sensing movement of a filter along a length of the interior of the chamber. ### Claim 19 (depends on 12) The method of claim 12, further comprising, after capturing the solid and/or semisolid material: removing an assembly of the chamber and the filter containing the solid and/or semisolid material from between the elongated medical device and the aspirator; and placing another assembly of a chamber and a filter between the elongated medical device and the aspirator. ### Claim 20 (depends on 12) The method of claim 12, further comprising: tilting or turning the chamber to defog the chamber.